The missing number is 5. They're the first five prime numbers.
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The sequence is 1,2,3,5,8,13,21.......8 is the missing number. This is known as a Fibonacci Sequence. The first two numbers are supplied and then further numbers in the sequence are formed from the sum of the two prior numbers. 3 = 1 + 2 5 = 2 + 3 8 = 3 + 5.....and so on.
Dodging numbers may be missing numbers in a sequence. For example, the underscore in the following sequence represents such a number: 2, 4, _ , 8, 10.
3 It falls between 2 and 4. However, the sequence is incorrect. I believe you mean to do the Fibonacci sequence which is 1,1,2,3,5,8,13.The next number in the series is 16.The numbers are increasing by consecutive integers (+1, +2, +3, +4, +5)
This list of numbers is the list of prime numbers. Following 11, the next two numbers in the list are 13 and 17.
17. The numbers are being increased by odd numbers beginning with 3.